Electrolytic cell sealing means



J ly 1952 J. B. BRENNAN 2,602,832

ELECTROLYTIC CELL SEALING MEANS Filed Dec. 10, 1947 s Sheets-Sheet 1 III'J'IIIIIIA o mnm-mmgmmmsxm J 3 50 ll 8 I 9 i 30 u no IN V EN TOR.

JOSEPH B. BREN/VHN July 8, 1952 J. B. BRENNAN 2,602,832

ELECTROLYTIC CELL SEALING MEANS Filed Dec. 10, 1947 3 Sheets-Sheet 2 I IN VEN TOR. JOSEPH B. BRE/V/Vfi/V y 1952 J. B. BRENNAN 2,602,832

ELECTROLYTIC CELL SEALING MEANS Filed Dec. 10, 1947 3 SheetsSheet s INVENTOR.

v JUSEPH B. BREA/Nfl/V WM w-W Patented July 8, 1952 UNITED STATES PATENT OFFICE ELECTROLYTIC CELL SEALING MEANS Joseph B. Brennan, Bratenahl, Ohio 7 Application December 10, 1947, Serial No. 790,836

10 Claims.

This invention relates to electrolytic cells and their formation, and especially to a sealing, and mounting means for electrolytic cells, such as electrolytic condensers.

The general object of the invention is to provide an improved sealing and mounting assemr bly for electrolytic cells.

Another object of the invention is to provide apparatus for mounting electrolytic cells whereby their dismounting and repair is-facilitated;

Another object is to use a mounting ring for positioning a condenser or the like.-

Another object is to enable the production of acondensercontainer or the like from a relatively, soft material without detractingfrom the formation of a tight solid mount of the container on a base plate.

Afurther object of the invention'lis to provide an uncomplicated but positive method. of sealing an electrolytic cell in a removable manner.

The foregoing and other objects and advantages of the invention will be manifest as the specification proceeds.

Attention is directed to the accompanying drawings, wherein;

Fig. l is an elevation, partially diagrammatic and partially in section, of a condenser and mounting means embodying the principles of the invention; I

Fig. 2 is a bottom plan of the apparatus of Fig. 1;

Fig. 3 is an elevation of the first operation in forming a clamping ring of the invention;

Fig. 4 is a plan of the cup shown in Fig. 3;

Fig. 5 is an elevation of a clamping ring formed from the cup shown in Figs. 3 and 4;

Fig. 6 is an elevation of a modified type of clamping ring of the invention;

Fig. 7 isan elevation, partially in section, of

denser and mounting plate showing use of the" cathode ring of Fig. 10. Y

By my invention, a cheaper, simpler; better means" of" sealing; assembling, mounting, and

disassembly and dismounting' for repair is ate can or box or tube which in practice may bemounted upright on a radio chassis andheld in" place by a mounting plate'generallymade of 2 stiff insulating material, for example, fibrous Bakelite sheet. rated as convenient and in practice now is, at-

tached to the condenser container by various holding devices such. as twisted fasteners of the so-called bayonet type, or screws, bolts, etc.

I propose, according to my invention,,to utilize the so-called mounting plate with modifica-'- tions to seal the condenser hermetically as a top. cover? therefor, and to retain and maintain the terminals of the condenser in fixed spaced relation to each other, asdesired.

To accomplish this purpose, I utilize attachment means to tightly fasten a Bakelite plate to the condenser-container in such a manner that this Bakelite'plate holds a soft sealingcompound previously placed in the condenser container end in place and in sealing relationship thereto.

This Bakelite plate extends transversely with reference to the axis of the condenser container beyond the outer periphery of the condenser container; Such extended portions of this Bakelite plate may be perforated and areused for spaced attachment to the radio chassis, for'instance. The central area, i. e. the area axially within theouter periphery of the condenser con tainer, is used as acompression plate to exert pressure-against a sealing means, such as a plas-- tic relatively inert soft pad of cement or rubberlike material placed in or over the end of theor 'attachments'to the condenser container in such a manner thatthe Bakelite mounting plate actsjas a coveriand part ofthe sealing means as Well as a mounting plate for said condenser container;

The. condenser container itself may consist of a' metallic can or a plastic hollow-device or tubu=- lar' fibrous material or combinations thereof.

Referring to the drawings presented herewith andwhich'are a part of the specificationsl ig; 1 shows a' condenser container l havin'g'a conventional condenser foil and paper assembly 2 therein of the so-called' dry type impregnated: with; proper electrolyte having cathode. lead 3 andanode'lead 4 extending therefrom. Anodc- This mounting plate is perfo- This maybe done by means of distorting such extension ears lead 4 extends through disk 5 as of Bakelite or hard rubber which is seated against shoulder 6 of the container l. Anode lead 4 also extends through a soft rubber-like pad I on the outside of disk 5 and preferably partially within the shoulder extention 6 of the container I. The soft rubber-like pad I may for the purposes of my invention extend somewhat beyond the periphery of the shoulder extension 6* of container I in its uncompressed position.

Referring to Fig. 1, the anode lead 4 is mechanically and conductively attached to a conductive terminal lug B which is somewhat embedded in the rubber-like pad I and which extends through an opening 9 in a flat Bakelite plate i0. This Bakelite plate Ill, Fig. l, is the mounting plate and tightly holds the lug 8 in place. One method of attaining compression of the mounting plate Hl, Fig. 1, against the end of the container 1,

Fig. 1, and also against the pad 1, Fig. 1, and also about the terminal 4 attached to lug 8 so that a leakproof seal for the condenser is accomplished, is to have notched ears or extensions l I, Fig. 1, of the container 1 extending through perforations in the mounting and compression plate 10 and clinched over mechanically to hold the plate l0 firmly against the pad I and to force the plate It) toward the outer edge of the end of the container shoulder 6.

The compression plate and lid iii, Fig. 1, may be perforated as at 33 in its area radially beyond the periphery of the container I, Fig. 1, for the application of rivets or other attachment means to the radio chassis, for example.

In Figs. 3 to 6, I have illustrated two types of securing devices which may be utilized, if desire d, to secure the container to the mounting plate. This construction renders unnecessary the notching of the end of the container I for securing same to the mounting plate l0.

An annular clampingring 23 is shown in Fig. 5 and this ring is provided with a plurality of lugs or ears 2! that extend therefrom in a substantially axial direction. The ring preferably is made from sheet metal and may be formed as illustrated in the progressive steps shown by Figs.- 3, 4 and 5. Fig. 3 shows a cup-shaped member 22 which is used in forming the ring 23. The member 22 has a portion of its bottom stamped or otherwise cut therefrom so that the bottom has a relatively long narrow members 23 extend radially inwardly toward the center of the member 22 and can be pushed or forced to extend downwardly therefrom to form the ears 2|. Smaller sections 24 may be formed at circumferentially spaced portions of the cup-shaped member 22 so as to I on the smooth edge of the ring 25 to facilitate engagement with a container for a condenser. The ring 25 has an end'section 23 which overlaps the other end of the ring and is suitably secured thereto in any conventional manner, as byengagement with a complementarily shaped recess in such end of the metal strip used in forming the ring 25. The ears or lugs protruding from the retaining rings 20 and 25 should be clinched If .de'. sired, similar ears, not shown, may be provided '50 contour as shown in Fig. 4 whereby a plurality of or turned over through openings in mounting plates, or shoulders formed on the condenser container so as tosecure the condenser to the mounting plate and certain ears (2! and 2'!) may be used as terminals. It is generally preferable to make the ears or lugs formed on the retaining rings on a somewhat smaller diameter than the outer diameter of the container with which the ring is to be associated. Hence, an inward grasping force is developed by the retaining ring, as Well as an'axial compressive force.

As a further possible modification of the invention, the rubber pad 1 shown in Fig. 1 may be replaced with a fluid material which can be cured at low temperatures. The material also should have cementing characteristics to aid in securing the disk 5 and the mounting plate 10 to the condenser container I. By the use of a liquid cement, the sealing of the condenser container is also facilitated. Natural rubber, synthetic rubber, resins or other similar materials can be used as a sealing material for the condenser container. Samples of commercial products available on the market and which would be satisfactory for this purpose are Cycleweld manufactured by The Chrysler Motor Company, or Marbon Ty-Ply. A cement Dewalco made by The Dewey & Almy Chemical Corporation or other similar products may also be utilized for this desired sealing action.

Fig. 7 illustrates another embodiment of the invention wherein a tubular condenser which may have a cardboard or plastic outer container may be mounted in an upright position by means of a mounting ring such as those illustrated in Figs. 3 to 6. in this instance, a condenser C is mounted within a tube 3| and has leads 32 and 33 extending therefrom. A retaining ring 34, similar to the ring 20, is engaged with the lower end of the tube 3i, as by crimping or spinning the upper edge. of the ring into engagement therewith, or, the ring 34 may be cemented to the tube 3!, and, in all events, lug portions of the ring 34 extend through holes in a mounting plate 35 and some of the lugs are crimped over as at 36 to compress the end of the tube 3| against the mounting plate. Other lugs extend axially from the tube 3| to provide terminals for the condenser in case one of the condenser leads is to be connected to the ring 34. s

A compression ring 4!, shown in Figs. 8 and 9, may be used in place of the ring 20 and it has an annular shoulder 42 in its base from which circumferentially spaced lugs 43 and 44 extend for securing the ring and associated condenser or equivalent device toa mounting plate or base and for providing terminals therefor.

In some instances, it may be desirable to provide a separate cathode ring which may be positioned on the inside or outside of the mounting plate, as desired. One of such rings 50 is shown in Fig. 10 and it has suitable terminal lugs 51 provided thereon and extending. therefrom. It also may be provided with lugs (not shown) to facilitate its engagement with the mounting plate when placed on the outer surfacethereof.

Fig. 11 illustrates one manner of assembling the cathode ring 50 in a condenser container, or the like. In this instance, the cathode ring 50 has an insulator disk 53 associated with its axially outer surface and a soft, unvulcanized rubber insulator disk 54 is positioned intermediate the insulator disk 53 and an insulator disk or a mounting base 55, as shown in the drawing.

The terminal lugs 5| of the cathode ring 50 nor-' mally will protrude through the mounting base 55. as-shown. A c1amping.:ring 20. i i t cure-1a. condenser container 56.1 to the. mounting base55 with theJcontainerhaving abasez'flange 51 formed. thereon over which the upper'edge of the: clamping ring 20 may be crimped or. otherwis secured. Lugs- 21 extendthrough holes formed in the mounting base and are clinched overthebase to secure the clamping ring and associated condenser container to themounting I base. slightresiliency in its mounting. Fig. 11 shows one lug 21 6 prior to its being cIinchedintoengagementwith the mounting-plate 55." By secur-ing However, the condensercontainer hasthe-condenser container 56 to. the mounting base in the manner shown, the condenser 56 can be formed'from soft-aluminum tubing,- or other material,.sincethe compressive sealing actionis' taken bythe cathode rin'g and the -clamping ring Insome instances, it-may be-suitable to, spin i the upper end of i the clamping ring 9 20 over into engagement with'th'econtainer 56 and avoidthe formation of a base flange on same;

Such distortionof the container wall should form a retainer shoulder in the container to form a seat for the cathode ring.

Referring again to Fig. 1, itwill-be realized thatthe -condenser 2 is positioned in-thecontainerl in any conventional manner. =When the condenser" 2 is smaller than the container; it usually -is-seplateof a radio chassis on; which all of the elements of the radio are, positioned but usually.

is a separatecondenser, mounting plate. Certain of the lugs extending down from the container. or container ring are. normally usedas terminals with other lugs securing the condenser container to a mounting plate.

In some instances, when forming a resilient seal for the end of a condenser, the liquid sealing material may be poured or otherwise directly associated with the open end of the condenser container, and the insulator disk 5 or equivalent structure may be omitted. In all events, the mounting plate or compression lid will be tightly pressed against the fluid as and after it sets to press the material tightly against the associated portion of the condenser so as to seal the end of same. The cement and the rubber sealing disks are of such a composition as to be very easily deformed. The disks when made of rubber, or rubber-like material use such material in unvulcanized form.

While several embodiments of the invention have been disclosed herein, it will be appreciated that modification of these embodiments of the invention may be resorted to without departing from the scope of the invention as defined by the appended claims.

Having thus described my invention, what I claim is:

1. A seal and mounting means for an electrolytic condenser comprising an open ended container adapted to receive the condenser, an insulator pad supported by and filling the end of said: container, a layer of? soft .yieldable. material: extending across the end. of said: container*ex;

teriorly of said pad, and. astiflieperforate mount ing platev covering the -end. of said containervv an T extending laterally therebeyond, said containen having-ears extending therefrom to. engage with said mounting. plate for forming. at unitary; as-

sembly-of said-pad, layer, plate and container with the components thereofbeingin compression.

engagement to seal the condenser.

2. A seal and mounting. means for anel'ectrolytic condenser comprising an open ended con tainer adaptedto receive thecondenser; a layer ofsoftyieldable material extending across the end: ofsaid container, meanscarriedby the con w tainer-for supporting; said layer. and a perforatemounting plate coveringthe endof saidcontainer and extending laterally therebeyond; said mount" ingplatebeing positioned exteriorly-of saidyieldable-material and having means in the'por'tion thereof lying laterally beyond the container forfacilitating engagement thereof with a support;

said container having means extendingtherefrom to engage-with said mounting plate for forming a unitary-assembly of said layer, plate and con-- tainer with; the component thereof being in compression engagementto seal the condenser.

3. An electrolytic condenser-comprisinga con- I denser, an open ended containeradaptedtore- 'ceivesaid condenser,'the open end ofsaid con-- tainer being enlarged andforming a shoulder in said container, an insulator pad associated with the end of said container and abutted againstsaid: shoulder, a layer of resilient material extending. across=the end of said container exteriorly 0f said'pad', and a perforatemounting plate cov--- ering the end of said container-and extending;

4. In a condenser construction, a mounting ring provided with lugsextending therefrom, a.

condenser container engaged with one end portion of said mounting ring, amounting plate, the lugs on said mounting ring being engaged with said mounting plate to secure said condenser container removably thereto, an insulator member positioned within said mounting ring, and a resilient member received in said mounting ring intermediate said insulator member and said mounting plate, said mounting ring compressing said resilient member between said insulator member and mounting plate to seal said condenser container.

5. In a condenser construction, a mounting ring provided with lugs extending therefrom, a condenser container having an end section engaged with one end portion of said mounting ring, a mounting plate, the lugs on said mounting ring being removably engaged with said mounting plate to secure the condenser container removably thereto, an insulator plate positioned within said mounting ring and adjacent the end section of said condenser container, and a resilient rubber-like member received in said mountin ring intermediate said plate, said mounting ring compressing said resilient member between said plates and container end section to seal the end of said condenser container.

6. A condenser comprising a can, condenser electrodes therein, internal shoulder means near an open end of said can, and sealing means for '7. A condenser comprising a metal can, a con-- denser therein, an externally extending flange at an open end of said can, a laminated sealing cap for said can comprising a pressure deformable central sealing lamina and relatively stiff substantially undeformable laminae on both sides thereof,'one of the; stifflaminae of said cap fitting against said flange at the open end of, said canand the other of said stiff laminae extending laterally beyond the flange of said can to form a mounting plate, anda clamping ring enga ed. With said flange and having clamping means extending therefrom to engage the outermost laminae and maintain the cap against the can end and compress the deformable sealing laminae to effect a seal.

8. A seal and mounting means for an electrolytic condenser comprising, an open ended container adapted to receive the condenser, a layer of soft yieldable material extending across the end of said container, and a perforate mounting plate covering the end of said container and extending laterally ,therebeyond, said mounting plate confining said yieldable material in said container and having apertures through the portion thereof extending laterally beyond said container, said container having means extending therefrom to engage with said mounting plate for forming a unitary assembly of said layer, plate and container with the components thereof being in compression engagement to seal the condenser.

9. A sealing and mounting device fora condenser comprising an open ended container adapted to receive the condenser, a support carried by rial covering the open end of said container and in engagement with said support, a substantially flat mounting plate positioned over the open end of said container in engagement with the sealing material and extending laterally beyond the outermost portions of said container at the open end, and means interconnecting the container and mounting plate for maintaining the mounting plate'in position and compressing the sealing material between the support and the mounting plate to seal the open end of said container.

10. A seal and mounting means for an electrolytic condenser comprising an open ended container adapted to receive the condenser, a layer of soft yieldable material extending across the open end of the container, supporting mean carried by the container for the soft yieldable material a clamping ring engaging the open end portion of the container, 2. perforate mounting plate positioned exteriorly of the yieldable material and covering the'open end of the container and ring and extending laterally beyond the container and ring, and securing means. carried by th ring and engaged with the mounting plate for compressing the plate against the end of the container and compressing the layer of yieldable material within the container to seal thev condenser in'the container.

' JOSEPH B. BRENNAN.

REFERENCES CI TED The following references are of record in the file of this patent:

'Helgason June 15, 1948 

